Accession Number : ADA183851

Title :   A Generalized Least-Squares Determination of Triaxial Stress States by X-Ray Diffraction and the Associated Errors.

Descriptive Note : Technical rept.,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Winholtz,R A ; Cohen,J B

PDF Url : ADA183851

Report Date : Jul 1987

Pagination or Media Count : 27

Abstract : The determination of residual stresses via x-ray diffraction is briefly reviewed, with particular emphasis on the triaxial stress state. A new method is proposed for determining the general stress tensor, which considerably reduces the variances of the stresses due to counting statistics and gradients. The procedure involves a generalized least square solution of strains measured at vario us tilts of the x ray beam to the sampled and a set of tilts not heretofore used is recommended to minimize these errors.

Descriptors :   *TRIAXIAL STRESSES, *X RAY DIFFRACTION, *STRESS ANALYSIS, COUNTING METHODS, STATISTICS, DETERMINATION, LEAST SQUARES METHOD, RESIDUAL STRESS, SOLUTIONS(GENERAL), TILT

Subject Categories : Mechanics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE